using QuikDawEditor.EditingClasses;
using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using static QuikDawEditor.EDITING.VstMethods;
using static QuikDawEditor.EDITING.StaticProperties;
using QuikDawEditor.VST;

namespace QuikDawEditor
{

    public partial class VstFxWindow : Window, INotifyPropertyChanged
    {

    
        bool mouseDownInTitleBar = false;
        System.Windows.Point MouseDownPos;

        private void TitleLabel_PreviewMouseDown(object sender, MouseButtonEventArgs e)
        {
            mouseDownInTitleBar = true;
            MouseDownPos = e.GetPosition(this);
            Mouse.Capture(this.TitleLabel);
        }

        private void TitleLabel_PreviewMouseMove(object sender, MouseEventArgs e)
        {
            if (mouseDownInTitleBar)
            {
                var newPoint = e.GetPosition(this) - MouseDownPos;
                this.Left += newPoint.X;
                this.Top += newPoint.Y;
            }
        }

        private void TitleLabel_PreviewMouseUp(object sender, MouseButtonEventArgs e)
        {
            mouseDownInTitleBar = false;
            Mouse.Capture(this.TitleLabel, CaptureMode.None);
        }

   
        private void VstFxFavoritesTV_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (VstFavoriteFolderEditing && !MouseInTextBox)
            {
                VstFavorite thisVF = (VstFavorite)editingTB.DataContext;
                if (editingTB.Text == "") { MessageBox.Show("Cannot have empty folder name"); return; }
                editingTB.BorderThickness = new Thickness(0);
                editingTB.Background = Brushes.Transparent;
                editingTB.IsReadOnly = true;
                editingTB.Focusable = false;
                VstFavoriteFolderEditing = false;
                thisVF.FolderName = editingTB.Text;
                SaveVstFxFavorites();
            }
        }

        bool MouseInTextBox = false;
        private void DisplayNameTextBox_MouseEnter(object sender, MouseEventArgs e)
        {
            TextBox thisTB = (TextBox)sender;
            thisTB.Background = thisTB.IsReadOnly ? Brushes.Gray : Brushes.White;
            MouseInTextBox = true;
        }

        private void DisplayNameTextBox_MouseLeave(object sender, MouseEventArgs e)
        {
            TextBox thisTB = (TextBox)sender;
            thisTB.Background = thisTB.IsReadOnly ? Brushes.Transparent : Brushes.White;
            MouseInTextBox = false;
        }


        bool MouseDownOnVstItem = false;
        Point MouseDownPoint = new Point();

        private void VstFxItemsGrid_PreviewMouseDown(object sender, MouseButtonEventArgs e)
        {
            Grid thisGrid = (Grid)sender;
            MouseDownPoint = e.GetPosition(thisGrid);
            thisGrid.CaptureMouse();
            MouseDownOnVstItem = true;
        }
        
        private void VstFxItemsGrid_PreviewMouseUp(object sender, MouseButtonEventArgs e)
        {
            MouseDownOnVstItem = false;
            ((Grid)sender).ReleaseMouseCapture();
        }

        private void VstFxItemsGrid_PreviewMouseMove(object sender, MouseEventArgs e)
        {
            Grid thisGrid = (Grid)sender;
            
            if (MouseDownOnVstItem)
            {
                Vector vec = Point.Subtract(e.GetPosition(thisGrid), MouseDownPoint);
                bool dragme = (Math.Abs(vec.X) > 6 || Math.Abs(vec.Y) > 6);
                if (dragme)
                {
                    MouseDownOnVstItem = false;
                    thisGrid.ReleaseMouseCapture();
                    var dataObj = new DataObject();
                    dataObj.SetData("vstfxrefdrag", (VstPluginReference)thisGrid.DataContext);
                    DragDrop.DoDragDrop(thisGrid, dataObj, DragDropEffects.Copy);
                }
            }
        }

        private void SelectedVstsLV_Drop(object sender, DragEventArgs e)
        {

            Track thisTrack = (Track)this.DataContext;

            if (e.Data.GetDataPresent("vstfxrefdrag"))
            {
                VstPluginReference thisVSTRef = (VstPluginReference)e.Data.GetData("vstfxrefdrag");
                if (thisVSTRef.isNotifying) return;
                
                AddVSTEffect(thisTrack, thisVSTRef);
                editingProject.NeedsSaving = true;
                if (SelectedVstsLV.Items.Count > 0) SelectedVstsLV.ScrollIntoView(SelectedVstsLV.Items[SelectedVstsLV.Items.Count - 1]);
            }
            
            else if (e.Data.GetDataPresent("vstfxfavdrag"))
            {
                VstFavorite thisVSTFav = (VstFavorite)e.Data.GetData("vstfxfavdrag");
                VstPluginReference thisVSTRef = thisVSTFav.myPluginRef;
                if (thisVSTRef != null)
                {
                    if (thisVSTRef.isNotifying) return;
                    AddVSTEffect(thisTrack, thisVSTRef);
                    editingProject.NeedsSaving = true;
                    if (SelectedVstsLV.Items.Count > 0) SelectedVstsLV.ScrollIntoView(SelectedVstsLV.Items[SelectedVstsLV.Items.Count - 1]);
                }
            }
        }

        private void SelectedVstsLV_DragOver(object sender, DragEventArgs e)
        {
            e.Handled = true;

            if (e.Data.GetDataPresent("vstfxrefdrag") | e.Data.GetDataPresent("vstfxfavdrag"))
            {
                if (e.Data.GetDataPresent("vstfxfavdrag"))
                {
                    VstFavorite thisVSTFav = (VstFavorite)e.Data.GetData("vstfxfavdrag");
                    if (thisVSTFav.ItemType == "Folder")
                        e.Effects = DragDropEffects.None;
                    else
                        e.Effects = DragDropEffects.Copy;
                }
                else
                    e.Effects = DragDropEffects.Copy;
            }
            else
                e.Effects = DragDropEffects.None;
        }

        bool MouseOverVstItem = false;
        private void VstItemStackPanel_MouseLeave(object sender, MouseEventArgs e) { }
        private void VstItemStackPanel_MouseEnter(object sender, MouseEventArgs e)  {  MouseOverVstItem = true;  }

        private void VstFxFavoritesTV_DragOver(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent("vstfxrefdrag"))
            { e.Effects = DragDropEffects.Copy; }
            else if (e.Data.GetDataPresent("vstfxfavdrag"))
            { e.Effects = DragDropEffects.Move; }
            else
                e.Effects = DragDropEffects.None;
        }

        private void VstFxFavoritesTV_Drop(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent("vstfxrefdrag"))
            {
                VstPluginReference thisVSTRef = (VstPluginReference)e.Data.GetData("vstfxrefdrag");
                VstFxFavorites.Add(new VstFavorite("Plugin", thisVSTRef));
                SaveVstFxFavorites();
            }
            else if (e.Data.GetDataPresent("vstfxfavdrag"))
            {
                VstFavorite thisVSTFav = (VstFavorite)e.Data.GetData("vstfxfavdrag");
                GetParentFavoriteCollection(VstFxFavorites, thisVSTFav).Remove(thisVSTFav);
                VstFxFavorites.Add(thisVSTFav);
                SaveVstFxFavorites();
            }

        }
        
        private void TextBox_PreviewDragOver(object sender, DragEventArgs e)
        {

            e.Handled = true;
            StackPanel thisSP = (StackPanel)sender;
            VstFavorite vstf = (VstFavorite)thisSP.DataContext;

            if (vstf.ItemType == "Folder")
            {
                if (e.Data.GetDataPresent("vstfxrefdrag"))
                { e.Effects = DragDropEffects.Copy; }
                else if (e.Data.GetDataPresent("vstfxfavdrag"))
                {
                    VstFavorite vfavsource = (VstFavorite)e.Data.GetData("vstfxfavdrag");
                    bool folderContainsFolder = vfavsource.ItemType == "Folder" && FolderContainsFolder(vfavsource, vstf);
                    if (vstf.VstFavorites.Contains(vfavsource) || folderContainsFolder)
                        e.Effects = DragDropEffects.None;
                    else
                        e.Effects = DragDropEffects.Move;
                }
            }
            else
                e.Effects = DragDropEffects.None;

        }

        private void TextBox_PreviewDrop(object sender, DragEventArgs e)
        {
            e.Handled = true;
            StackPanel thisSP = (StackPanel)sender;
            VstFavorite vstf = (VstFavorite)thisSP.DataContext;

            if (e.Data.GetDataPresent("vstfxrefdrag"))
            {
                VstPluginReference thisVSTRef = (VstPluginReference)e.Data.GetData("vstfxrefdrag");
                vstf.VstFavorites.Insert(0, new VstFavorite("Plugin", thisVSTRef));
                vstf.IsExpanded = true;
                SaveVstFxFavorites();
            }
            else if (e.Data.GetDataPresent("vstfxfavdrag"))
             {
                VstFavorite thisVSTFav = (VstFavorite)e.Data.GetData("vstfxfavdrag");
                GetParentFavoriteCollection(VstFxFavorites, thisVSTFav).Remove(thisVSTFav);
                vstf.VstFavorites.Insert(0, thisVSTFav);
                vstf.IsExpanded = true;
                SaveVstFxFavorites();
            }
        }

  
        bool MouseDownOnVstFavorite = false;
        Point MouseDownOnVstFavoritePoint = new Point();

        bool VstFavoriteFolderEditing = false;

        private void DisplayNameTextBox_PreviewMouseDown(object sender, MouseButtonEventArgs e)
        {
            TextBox thisTB = (TextBox)sender;
            VstFavorite thisVF = (VstFavorite)thisTB.DataContext;

            if (e.ClickCount == 2)
            {
                if (VstFavoriteFolderEditing) return;
                if (thisVF.ItemType == "Folder")
                {
                    editingTB = thisTB;
                    thisTB.BorderThickness = new Thickness(1);
                    thisTB.Background = Brushes.White;
                    thisTB.IsReadOnly = false;
                    VstFavoriteFolderEditing = true;
                    thisTB.Focusable = true;
                    thisTB.SelectAll();
                }
                return;
            }

            MouseDownOnVstFavorite = true;
            MouseDownOnVstFavoritePoint = e.GetPosition(thisTB);
            thisTB.CaptureMouse();
        }

        private void DisplayNameTextBox_PreviewMouseUp(object sender, MouseButtonEventArgs e)
        {
            MouseDownOnVstFavorite = false;
            ((TextBox)sender).ReleaseMouseCapture();
        }

        private void DisplayNameTextBox_PreviewMouseMove(object sender, MouseEventArgs e)
        {
            if (MouseDownOnVstFavorite)
            {
                TextBox vstfTB = (TextBox)sender;
                VstFavorite thisVFav = (VstFavorite)vstfTB.DataContext;
                bool isDraggablePlugin = thisVFav.ItemType == "Plugin" && thisVFav.ExistsVstFx;
              
                if (isDraggablePlugin)
                {
                    Vector vec = Point.Subtract(e.GetPosition(vstfTB), MouseDownOnVstFavoritePoint);

                    bool dragme = (Math.Abs(vec.X) > 5 || Math.Abs(vec.Y) > 3);
                    if (dragme)
                    {
                        MouseDownOnVstFavorite = false;
                        vstfTB.ReleaseMouseCapture();
                        var dataObj = new DataObject();
                        dataObj.SetData("vstfxfavdrag", (VstFavorite)vstfTB.DataContext);
                        DragDrop.DoDragDrop(vstfTB, dataObj, DragDropEffects.Move | DragDropEffects.Copy);
                    }
                }
            }

        }

        bool scrolling = false;

        private void ScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
        {
            if (scrolling) return;
            scrolling = true;
            ScrollViewer sviewer = (ScrollViewer)sender;
            sviewer.ScrollToVerticalOffset(sviewer.VerticalOffset - e.Delta / 3);
            scrolling = false;
        }

    }

}